Ventilating sash-lock, &amp;c.



No. 743.137. PATENTED NOV. s, 1903. J. c. BLA IR. VENTILATING SASH LOGK, 6w.

APPLICATION FILED FEB. 7. 1903.

NO MODEL. 2 SHEETS-SHEET Z.

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INVENTOR;

ATTORNEYS a I W E M a 4 J Lb/maple T' z mmusyzflns ca, Pumo-un-d, WASHINGTON. u. c.

WITNESSES $444 2 UNITED STATES Patented November 3, 1903.

PATENT OFFIC VENTILATING SASHVQLOCK, 8.0.

SPECIFICATION forming part of Letters Patent No. 743,137, dated November 3, 1903. Application filed February 7, 1903. Serial No. 142,340. (No model.)

To (ZZZ whom it may concern.-

Be it known that I, J OSEPH CALVIN BLAIR, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented and produced new and original Improvements in Ventilating Sash-Locks, &c.; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and tonu merals of reference marked thereon, which form a part of this specification.

The objects of this invention are to provide for windows a sash-lock which will limit the opening of the window to a distance sufii-- may be hereinafter referred'to in connection with the description of the working parts, The invention consists in the improved ventilating sash-lock, &c., and in the arrangements and combinations of parts of the same, all substantially as will be hereinafter set forth, and finally embraced in the clauses of the claim.

Referring to the accompanying drawings,

in which like numerals of reference indicate corresponding parts in each of the several figures, Figure 1 is an inside elevation of a closed window having my improved lock applied to the sashes thereof, and Fig. 2 is a section of the same upon line 00. Fig. 3 is an inside elevation with the sashes open to their widest extent; and Fig. 4 is a vertical section of the same upon line y, Fig. 3. Fig. 5 illustrates in vertical section the window partly open and the locking-lever turned to such a position as it might assume in an attempt to disengage it. Fig. 6 is a plan view of the sashlock members in engagement, the windowbeing in section upon line y, Fig. 3. Fig. 7 is a vertical section taken through the middle of the sash-lock, as upon line z, Fig. 6, and showing the construction thereof, the sashes being in open position; and Fig. 8 is a similar view showing the sashes in closed position and illustrating how the locking-lever may then be disengaged. Figs. 9 and 10 are perspective views of the upper and lower sash members of my improved lock, respectively.

In said drawings, 1 and 2 indicate the upper and lower sashes of a window adapted to slide in a frame 3 of any common and wellknown construction and to which I have shown my improved ventilating sash-lock applied. Said sash-lock comprises two members, one attached to the upper sash 1 at its side and near its bottom and the other attached to the lower sash 2 near the side thereof. The member which is applied to the lower sash comprises a casting 4, adapted to be secured horizontally upon the top of the lower sash, as screws 5, and providing upwardlyextending ears 6 6, arranged transversely of the plane of the window. Between said ears is pivoted a locking lever or arm 7, which nor: mally extends horizontally inward toward the glass of the upper sash and is provided at its extremity with a finger or lateral projection 8, bent toward that side of the upper sash upon which the other member of my improved lock is secured. The said locking-lever 7 is normally held in horizontal position by a leafspring 9, projecting rearwardly upward from a perforation 10 in the base-plate 4 and having a shoulder 11 to engage a cooperating stop 12 upon the under side of the lever 7 when the same is in normal horizontal position. The resiliency of said spring 9 normally holds it in such engagement with the lockingarm 7, and for releasing purposes the end of the spring projects out from the lock member at the front of the sash to form a fingerpiece 13.

The second member 14 of my sash-lock comprises a flat plate or strip of metal adapted to be secured longitudinally upon the side piece 15 of the upper sash and project inward at its edge 16 over the glass. The lower end of said strip is preferably beveled at the form, as at 17, and the upper end has alater'al extension 18 at its inner edge to form astop at right angles to the projecting edge 16. Said plate is screwed firmly to the upper sash in such position with relation to the member on the lower sash that the locking-arm 7 normally lies close to the edge 16 of the plate 14, with its finger 8 reaching behind the same, as shown in Fig. 6. Thus the sashes may be freely moved with respectto each other until the locking-arm 7 engages the lateral stop 18 at the top of the strip member 14:, thus positively preventing any further separation of the sashes. Furthermore, the said member 14 is arranged upon the upper sash at such a distance above the lower end thereof that when the sashes are closed the tongue 7 may upon disengaging the leaf-spring 9 be tipped into idle position, as shown in Fig. 9, its eX- tremity in doing this just clearing the lower end of the member 14, as shown in Fig. 8. This will enable the sashes to be operated without any restraint from the look, as in cleaning the window or opening it when the room is occupied, it being understood that my invention is to be used more particularly when no person is near to guard the window and still it must be opened for ventilation.

The plate or strip comprising the member 14: is'made thin, so that it can be screwed directly upon the inside of the upper sash and project therefrom no farther than the lower end or rail 19 of the sash, so that the upper end or rail 20 of the lower sash will clear the same in sliding. It will be remembered that sashes are commonly made with the said lapping ends, which form the joint in closing, each extended toward the other out of the plane of the sash to allow clearance, as shown in the drawings, and it is of this fact that I take advantage. Furthermore, the member upon the lower sash does not project into the room beyond the plane of said sash, and thus screens may be employed with my improved look, as is now common. I

It will be noted that when the sashes are closed, as shown in Fig. 8, the locking-arm 7 cannot be opened by any thin flat instrument inserted between the two sashes, because of the leaf-spring 9, which is inaccessible, and if the sashesare opened to permit access to the said spring from the outside, as by a wire or other means, the said locking-tongue cannot then be released, because of its hooked end 8 engaging the plate or member on the upper sash. Hence there is no possibility of releasing or unlocking my device from the outside, and it can only be done from the inside when the window is completely closed.

I prefer to provide upon the upper side or edge of the locking-lever 7 an inwardly-facing finger-piece 21, by which the lever can be manipulated, when desired, upon releasing the spring 9. Preferably this finger-piece consists simply of a recess in the edge of the lever; but any other construction may be used.

Having thus described the invention, what I claim as new is 1. The combination with upper and lower window-sashes, ofa plate secured upon one side piece or stile of the upper sash and projecting at its inner edge beyond the same to provide a recess therebehind, said plate being beveled at the front side of its lower end and having at its upper end a lateral projection from said inner edge, and a cooperating member upon the lower sash having a looking arm or lever normally extending toward the upper sash adjacent to the inner edge of the said plate in the upper sash and having a finger adapted to lie behind said plate.

2. In asash-lock, the combination of a plate adapted to be secured upon the side piece of the upper sash of a window and present a free vertical edge with a stop at the upper end,of a cooperating member comprising a basepiece adapted to be secured upon the top rail of the lower sash of a window, a locking arm or lever pivoted upon said base-piece to swing in vertical plane and adapted to lie transversely and slidably against said edge of the first member or plate, said arm or lever having a stop at its under side, and aleaf-spring supported at one end on said base-piece and forming at the other end a finger-piece and having intermediate of said ends a shoulder adapted to engage said stop on the lockinglever when the latter is in looking position.

3. 4 In a sash-lock, the combination of a plate adapted to be secured upon the side piece of the upper sash of a window and present a free vertical edge with a stop at the upper end, of a cooperating member comprising a basepiece adapted to be secured upon the top rail of the lower sash of a window, a locking arm or lever pivoted upon said base-piece to swing in vertical plane and adapted to lie transversely and slidably against said edge of the first member or plate, said arm or lever having a stop at its under side, and an inwardlyfacing finger-piece at its upper side, and a leaf-spring arranged between the base-piece and lever and adapted to engage said locking lever and normally hold the same against pivotal movement.

In testimony that I claim the foregoing I have hereunto set my hand this 26th day of January, 1903.

JOSEPH CALVIN BLAIR.

Witnesses:

RUSSELL M. EVERETT, O. B. PITNEY. 

